The Cosia system, a star system situated in the Deep Core region of the galaxy and encompassed by Cosian Space, contained a single star. Furthermore, it possessed at least one planet, specifically Cosia, which served as the system's sole habitable world. Cosia was the native world of the Cosian species, and it was circled by two moons, known as Tabu and Tebu, in orbit.
- Disciples of Harmony (First mentioned)
- Star Wars Galaxy Map